It has been observed that power is available in these places for 3 to 4 hours only, in a 24 hours cycle, at unpredictable time of day/night in bits and pieces. Many a times, even if the power is there, the Grid voltage is so low that it is as good as not available. Consequently, the UPS batteries are not charged sufficiently, resulting in the ATM being down for several hours in a stretch. Solar Power Solotions